面试题 05. 替换空格

题目描述

请实现一个函数，把字符串 s 中的每个空格替换成"%20"。

示例

示例1

输入：s = “We are happy.”
输出：“We%20are%20happy.”

题解

class Solution {
public:string replaceSpace(string s) {string ans;for (char ch : s) {if (ch == ' ')ans += "%20";elseans += ch;}return ans;}
};